Study of beam–beam effects in eRHIC with self-consistent beam–beam simulation

✍ Scribed by J. Shi; L. Jin; F. Wang

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 458 KB
• Volume: 555
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.09.018

✦ Synopsis

Beam-beam effects in eRHIC was studied with a self-consistent (strong-strong) beam-beam simulation by using the particle-in-cell method. Beam-beam limits were examined as thresholds of the onset of coherent beam-beam instability. For the proposed luminosity, the bunch intensities optimized in consideration of the beam-beam effect were discussed. It was also found that the modulation in the beam-beam interaction on PACMAN bunches in eRHIC can induce a high-order coherent beam-beam instability with a spontaneous oscillation of transverse beam size and a chaotic oscillation of beam centroid. As the beam-beam interaction in eRHIC is traditionally considered as strong-weak or very unsymmetrical, the beam-beam problem in eRHIC represents an example of the coherent beam-beam effect in the strong-weak case of beam-beam interactions.